Compiler: DNAGroup: Add special parent level up code
Compiler: DNAVisGroup: Make traverse
Compiler: Implement new recursion method
Compiler: DNAWall: Fix recurse parameter
Compiler: DNAVisGroup: Add missing counts
Compiler: DNAVisGroup: Filter edges
Compiler: Fix issue #1
Compiler: Make small changes in README.md
Compiler: Change DNAGroup.recurse() to DNAGroup.traverseChildren() ...

Verbosity was added to DNAVisGroup as well.
Compiler: Debug statements are now done before their action is performed.

This may help with tracking down bugs.
Compiler: DNASignBaseline: Pack fields using int32 instead of int16

This is necessary because some of these fields can get pretty big.
Merge branch 'master' into wip/pdna-reader